package com.ruoyi.common.datasource.interceptor;

import java.text.DateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Properties;

import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
import org.apache.ibatis.type.TypeHandlerRegistry;
import org.springframework.stereotype.Component;
import org.apache.ibatis.cache.CacheKey;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;

/**
 * @version 2018年8月15日 下午3:54:03
 * @author breeze
 * 用于打印完整的SQL
 */
@Intercepts({
   @Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class}),
   @Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class,CacheKey.class,BoundSql.class}),
   @Signature(type = Executor.class, method = "update", args = {MappedStatement.class, Object.class})
})
@Component
public class PrintSqlInterceptor implements Interceptor{

	@Override
	public Object intercept(Invocation invocation) throws Throwable {
		try {
			MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];
			Object parameter = null;
			if (invocation.getArgs().length > 1) {
				parameter = invocation.getArgs()[1];
			}
			BoundSql boundSql = mappedStatement.getBoundSql(parameter);
			Configuration configuration = mappedStatement.getConfiguration();
			
			// 获取sql语句
			//System.err.println(showSql(configuration, boundSql));
		} catch (Exception e) {
			// TODO: handle exception
		}

		// 执行结果
		return invocation.proceed();
	}

	@Override
	public Object plugin(Object target) {
		return Plugin.wrap(target, this);
	}

	@Override
	public void setProperties(Properties properties) {}

	public String showSql(Configuration configuration, BoundSql boundSql) {  
	    Object parameterObject = boundSql.getParameterObject();  
	    List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();  
	    String sql = boundSql.getSql().replaceAll("[\\s]+", " ");  
	    if (parameterMappings.size() > 0 && parameterObject != null) {  
	        TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();  
	        if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {  
	            sql = sql.replaceFirst("\\?", getParameterValue(parameterObject));  
	            } else {  
	                MetaObject metaObject = configuration.newMetaObject(parameterObject);  
	                for (ParameterMapping parameterMapping : parameterMappings) {  
	                    String propertyName = parameterMapping.getProperty();  
	                    if (metaObject.hasGetter(propertyName)) {  
	                        Object obj = metaObject.getValue(propertyName);  
	                        sql = sql.replaceFirst("\\?", getParameterValue(obj));  
	                } else if (boundSql.hasAdditionalParameter(propertyName)) {  
	                    Object obj = boundSql.getAdditionalParameter(propertyName);  
	                    sql = sql.replaceFirst("\\?", getParameterValue(obj));  
	                }  
	            }  
	        }  
	    }  
	    return sql;  
	}
	
	private String getParameterValue(Object obj) {
		String value = null;
		if (obj instanceof String) {
			value = "'" + obj.toString() + "'";
		} else if (obj instanceof Date) {
			DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT, Locale.CHINA);
			value = "'" + formatter.format(obj) + "'";
		} else {
			if (obj != null) {
				value = obj.toString();
			} else {
				value = "";
			}
		}
		return value;
	}
}
